Best Buy (BBY) is a specialty electronics retailer that competes with general retailers like Wal-Mart (WMT) and Costco (COST), as well as other specialty retailers like GameStop and Radio Shack (RSH). Our price estimate for Best Buy stands at $38.48, which is about 20% above market price.

The company's stock has struggled to gain ground since Best Buy's earnings release in December 2010. Best Buy has faced limited demand for featured products like 3D TVs, and appears to have underestimated competition from players like Wal-Mart and Amazon.com (AMZN).

CBS (CBS) competes with other media conglomerates like Disney (DIS), News Corp. (NWSA), Time Warner (TWX) and Viacom (VIA) in the media and entertainment business.

The company recently released its fourth quarter 2010 earnings. Based on observed improvements in margins across all categories, an improving advertising environment and continued growth in the local broadcasting segment, we have updated our price estimate for CBS stock to $26.34. Our price estimate for CBS stands at 18% premium to the market price.

Oprah Winfrey, arguably the most powerful woman in entertainment (if not the world in general), is preparing to pack her luxurious bags. She's announced that in 2011, after a quarter-century of favorite things and heartfelt interviews, "The Oprah Winfrey Show" will be no more. The last program is scheduled for Sept. 9, 2011. One can only imagine who might be her guests.

In syndication across the country, Oprah's eponymous program is the top-rated U.S. daytime show (take that, Days of Our Lives!), with an average viewership of 7.1 million this year.

While not entirely unexpected, the news is likely a bit of a blow to CBS Corporation (CBS), as its CBS Television Distribution arm syndicates the program. Additionally, Walt Disney (DIS) might feel the sting of an Oprah departure as Disney-owned ABC is the primary network that airs the show. And will it impact O, Oprah's monthly magazine published by the Heart Corporation? To say nothing of all of the manic women in the audience who long for a chance at one of Oprah's favorite things.

Analyst upgrades:

• Collins Stewart upgraded General Dynamics (NYSE: GD) to Buy from Hold as it finds the valuation compelling at current levels and sees potential upside from a better economy and better-than-expected defense budgets.
• SunTrust views the sell-off in shares of Cabot Oil (NYSE: COG) as a buying opportunity and expects the Pennsylvania Department of Environmental Protection order to be resolved quickly. The firm upgraded Cabot to Buy from Neutral.
• Barclays upgraded Cisco (NASDAQ: CSCO) to Overweight from Equal Weight based on expectations for improved carrier demand, continued U.S. momentum, and an improved Europe.
• Applied Materials (NASDAQ: AMAT) was upgraded to Buy from Hold at Citigroup.
• Stericycle (NASDAQ: SRCL) was upgraded to Gradually Accumulate from Hold at Soleil.
• Grupo Televisa (NYSE: TV) was upgraded to Neutral from Sell at Goldman.

It's just weeks away -- a potentially big change for the television show that transfixes America. But how many people would watch it if the show's superstar decided to take a hike? That's not just a troubling question for viewers of the show but for investors in the stock of the company that licenses it around the world. What show am I talking about? American Idol. Which star is thinking of leaving? Wait for it -- Simon Cowell. And what stock could take a beating if he leaves? CKX Inc (NASDAQ: CKXE).

Simon Cowell is thinking of leaving American Idol. According to MSNBC, Simon said "I'll make a decision about (whether to stay with the show) next year." Why would Simon leave? He claims it's not personality conflicts but the workload and his belief that the show could keep those demands going "for another 10 years." But if Simon leaves, would the show be as popular? Could the producers find someone else to be the harsh voice of reality?

That's an important question for investors in CKX. Way back in June 2007, CKX accepted a bid to go private in a $1.3 billion LBO led by its founder Robert Sillerman. But on November 4. 2008, that deal fell apart due to tightening credit conditions. This put Sillerman's 19X, which was leading the buyout, on the hook for a $37.5 million termination fee, which it said it would pay for with about 3.3 million shares of CKX common stock then valued at $11.08 per share and $500,000 in cash. The company said it will pay the fee in full within 30 days of the deal's termination date.

PC and chip companies have been trying to get TV viewers to use internet functions on their home entertainment systems for years. The problem may be that people who watch television are old. Consumers who use PCs are young. That has not stopped repeated attempts to marry the two.

Intel (NASDAQ: INTC) and Yahoo! (NASDAQ: YHOO) are making another run at putting the two technologies together and it will probably fail. According to The Wall Street Journal, "The pair outlined software tools, based on Yahoo technology, to help companies deliver Web content alongside TV programming. The software complements a new chip from Intel designed to enable interactive features on TVs."

Under this new plan, web content will sit in a bar at the bottom of the screen.

TV viewers already see information at the bottom of their TV monitors. Most business news channels like CNBC use the space to run stock quotes. Sports programming often scrolls scores in that section of the screen. Those bits of information may be useful, but TV is still a passive experience.

People who sit in front of a television set want information and entertainment. They do not want to have to make any effort to get those things. The PC has hundreds of applications that involve a great deal of effort. The keyboard is an "active" feature. People sitting in lounge chairs to watch the tube want to fall asleep.

Douglas A. McIntyre is an editor at 247wallst.com.